EBS Flashcards

1
Q

What is EBS?

A

Elastic Block Storage.
These are virtual disks/volumes that are placed in a specific to an availability zone but are replicated to protect from single points of failure.

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2
Q

What can you do with them?

A

1) Create storage volumes & attach to EC2 instances.
2) You can create file systems on top of them.
3) Run a database or anything you want on block storage.
4) You can install applications on them.

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3
Q

What is the EBS root volume?

A

The volume which the operating system is installed on them. Root (Linux) or C Drive (Windows).

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4
Q

Volume Types?

A
  1. General Purpose (SSD) GP2.
  2. Provisioned IOPS (SSD) IO1.
  3. Throughput Optimised HDD (ST1)
  4. Cold HDD (SC1)
  5. Magentic (Standard)
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5
Q

Characteristics of General Purpose SSD ?

A

1) General purpose.
2) A balance of price and performance.
3) Ratio of 3 IOPS per GB with up to 10,000 IOPS.
4) Burst up to 3,000 IOPS (for extended periods of time)

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6
Q

Characteristics of Provisioned IOPS SSD?

A

1) For high-performance applications.
2) If you need more than 10,000 IOPS
3) Can provision up to 20,000 IOPS per volume.

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7
Q

Characteristics of Throughput optimised HDD (ST1)?

A

1) Big Data
2) Data warehouses
3) Log processing
4) cannot be a boot volume.

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8
Q

Characteristics of Cold HDD (SC1)?

A

1) Lowest costs storage
2) Designed for infrequently accessed workloads.
3) File Server
4) cannot be a boot volume

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9
Q

Characteristics of Magnetic (Standard)?

A

1) Lowest cost per gigabyte of all EBS volumes that is bootable.
2) Magnetic volumes are ideal for workloads where is accessed infrequently.
3) Applications where the lowest storage is important.

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10
Q

Can you migrate EBS volumes to different regions?

A

1) Take a snapshot
2) Create an AMI
3) Copy the AMI to the new region
4) Launch the instance in the new region, using the AMI.

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11
Q

How can you move an EBS volume from one AZ to another?

A

1) Create a snapshot.
2) Create an AMI from snapshot.
3) Launch a new instance from that AMI and select the new AZ.

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